158+262+138 375+219+381+225 158+262+138 375+219+381+225 5001-247-1021-232158+262+138 375+219+381+225 158+262+138 375+219+381+225 5001-247-1021-23249X102—2X49 125X76X8 103X3249X102—2X49 125X76X8 103X32四則運算與簡便計算練習題一、計算下面各題121—111?37 (121—111?37)X5 280+650+1345X20X3 1000—(280+650+13) (95—19X5)+74(120—103)X50760+10+38(270+180)+(30—15)707—35X20 (95—19X5)+7419X96-962+74 10000-(59+66)X64 5940+45X(798616)(270+180)+(30—15)(315X40-364)+7 12520+8X(121+11)(2010-906)X(65+15) 707—35X2050+160+40 (58+370)+(64-45) 120-144+18+35347+45X2-4160+52(58+37)+(64-9X5) 95+(64-45) 178-145+5X6+42 420+580-64X21+28 812-700+(9+31X11)(136+64)X(65-345+23) 85+14X(14+208+26)121—111+37 (120—103)X50(284+16)X(512-8208+18) 120-36X4+18+35(58+37)+(64-9X5)(121—111+37)X1000(58+37)+(64-9X5)(121—111+37)X1000—(280+650+9846—87X(360+60)(124—85)X12+26325+13X(26-250)二、面各題，怎樣簡便就怎樣計算。45X20X35 280+650+1313) 760+10+38508X345+(1526-1521)(59+21)X(96+8)140-90+5+678(24分)41000+8+125 6756-193-2075824+8X（85-78） 840+28+70X18 794-19868X2572X125 97X360+3X360384+98X25X4 724+26X24+724三、用簡便方法計算（12分）756-193-207 101X92 4800+25+488X125428X50+71X50+5098X134（加減法接近整百數(shù)的簡算）184+98 695+202 864-199 738-301（加法交換律和結(jié)合律的運用）380+476+120 （569+468）+（432+131）（減法的簡算，重點：運算符號變化的處理）256-147-53 373-129+29 89-（89+74） 456-（256-36）（乘法交換律和結(jié)合律的運用，重點：一個因數(shù)分成兩個因數(shù)的處理）28X4X25 125X32X25 9X72X125（乘法接近整百數(shù)的簡算）102X35 98X42（乘法分配律的運用）26X39+61X26 356X9-56X9 78X101-7852X76+47X76+76 134X56-134+45X134 99X55+55（乘法分配律的綜合運用）48X52X2-4X48 25X23X（40+4） 999X999+1999四、綜合練習：(105+24)X15+3 175+280+40-25 (205-101+152)+8(105+24)X15+3 175+280+40-25 (205-101+152)+89-2.45-1.65 21+0.56+11.3 64.89-7.88-13.69-2.45-1.65 21+0.56+11.3 64.89-7.88-13.6(181+2564)+2719 (2130+783+270)+1017(181+2564)+2719 (2130+783+270)+101732X(25+125) 32X(25+125) (181+2564)+2719 378+44+114+242+222158+262+138 375+219+381+225 5001-247-1021-232158+262+138 375+219+381+225 5001-247-1021-232276+228+353+219 178X101-178 (375+1034)+(966+125)(2130+783+270)+1017 99+999+9999+99999 88X125102X767755-(2187+755) 2214+638+286 3065-738-1065 899+344102X762357-183-317-357 2365-1086-214 497-299 2370+199525X(24+16) 3999+498 1883-398 12X25 75X2425X32X125 79X42+79+79X57138X25X4 (13X125)X(3X8) (12+24+80)X50704X25 178X99+17825X32X125 32X(25+125) 88X125102X76 58X98 58X98178X101-178 84X36+64X8475X99+2X75 8100+4+75 16800?12083X102-83X2 50X(34X4)X325X(24+16) 704X25 7300+25+498X199 123X18-123X3+85X123178X99+178 75X24 138X25X479X42+79+79X57 7300+25+48100+4+75 (13X125)X(3X8)16800+120 30100+2100 32000+40049700+700 (12+24+80)X501248+24 3150+15 4800+2521500+125 123X18-123X3+85X123

378+44+114+242+222 276+228+353+219 (375+1034)+(966+125)99+999+9999+999997755—(2187+755)2214+638+2863065-738-1065 899+3442357—183—317—357 2365-1086-214 497-2992370+1995 3999+498 50X(34X4)X31883-398 12X25 84X36+64X8475X99+2X75 83X102-83X298X199五、脫式計算：128+35X3104X9-72+818X5+522+3五、脫式計算：128+35X3104X9-72+818X5+522+3450+5+29X6560+4-630+7(42+18)X(56-26)149X5+520X43+(289-198)X264X8+78X2226X4-425+5(135+65)+(15-7)300-(76+40X3)45+55+5-20700-125X3145-150+2+2348X3+240X2784+8+105X4(210+630)+7162+6-96+8900+(15+3)7362+9X7(439+725)+68(100-51)+17(37X15-55)X8(279+32X15)X6412X(280-80+4)330+5+46X7984+6X389X2+86252+9+(11-4)522+(328-319)+42305X(400-395)-27858X(6X4)+29953-180X5388+9-668+440X(5+3)(445+5+172)X18(488+32X5)+12400-225+5+145156+187+17X9325+13X(266-250)(242+556)+14X8

156+187+17X9325+13X(266-250)(242+556)+14X8(160+880)X20550+230X62+31(160+880)X20550+230X62+314000+25-13X12六、簡便運算199999+19999+1999+199+199999X2222+3333X333456X3+56X27+56X96-56X57+5698766X98768—98765X987697.83+2.34-0.83+6.667.83+2.34-0.83+6.6635.6-1.8-15.6-7.248.4+2.78+51.6-0.783.07-0.38-1.62132.44-(58.74+19.44)13.75-(3.75+6.48)47.8-7.45+8.215.2-6.8-3.457.5+4.9-6.31.76+3.44+0.3523.4+3.4-0.237.5+4.9-6.523.4-0.8+13.45.93+0.49+2.06七、小數(shù)加減混合運算題25.6-(0.23+5.6)-1.773.82+2.9+0.18+9.15.93+0.19+2.8123.4+0.8-13.4-7.21.27+3.9+0.73+15.17.5+4.8-6.57.14-0.53-2.4736.8-4.5+6.981.76+0.65+3.243.45+1.79+0.6536.54-1.76-8.666.02+3.6+1.9836.8